<!DOCTYPE html>
<html xmlns = "http://www.w3.org/1999/xhtml" xmlns:th = "http://www.thymeleaf.org"
   xmlns:sec = "http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">

   <head>
      <title>Spring Security示例</title>
   </head>
   <body>
      <div th:if = "${param.error}">
         无效的用户名和密码.
      </div>
      <div th:if = "${param.logout}">
         你已经注销.
      </div>

      <form th:action = "@{/login}" method = "post">
         <div>
            <label> 用户名 : <input type = "text" name = "username"/> </label>
         </div>
         <div>
            <label> 密码: <input type = "password" name = "password"/> </label>
         </div>
         <div>
            <input type = "submit" value = "登录"/>
         </div>
      </form>
   </body>
</html>